#include "doorbell_wifi.h"
#include <nvs_flash.h>
#include <esp_wifi.h>
#include <esp_log.h>
#include <wifi_provisioning/manager.h>
#include <wifi_provisioning/scheme_ble.h>
#include <qrcode.h>

#define TAG "doorbell_wifi"

#define PROV_QR_VERSION "v1"
#define PROV_TRANSPORT_BLE "ble"
#define QRCODE_BASE_URL "https://espressif.github.io/esp-jumpstart/qrcode.html"

static doorbell_wifi_callback_t doorbell_wifi_callback;

static void doorbell_wifi_event_handler(void *event_handler_arg, esp_event_base_t event_base, int32_t event_id, void *event_data)
{
    if (event_base == WIFI_EVENT)
    {
        // 连接wifi
        esp_wifi_connect();
    }
    else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP)
    {
        doorbell_wifi_callback();
    }
    else if (event_base == WIFI_PROV_EVENT && event_id == WIFI_PROV_END)
    {
        // 配网结束，注销wifi provisioning manager
        wifi_prov_mgr_deinit();
    }
}

static void get_device_service_name(char *service_name, size_t max)
{
    uint8_t eth_mac[6];
    const char *ssid_prefix = "PROV_";
    esp_wifi_get_mac(WIFI_IF_STA, eth_mac);
    snprintf(service_name, max, "%s%02X%02X%02X",
             ssid_prefix, eth_mac[3], eth_mac[4], eth_mac[5]);
}

static void wifi_prov_print_qr(const char *name, const char *username, const char *pop, const char *transport)
{
    if (!name || !transport)
    {
        ESP_LOGW(TAG, "Cannot generate QR code payload. Data missing.");
        return;
    }
    char payload[150] = {0};
    if (pop)
    {
        snprintf(payload, sizeof(payload), "{\"ver\":\"%s\",\"name\":\"%s\""
                                           ",\"pop\":\"%s\",\"transport\":\"%s\"}",
                 PROV_QR_VERSION, name, pop, transport);
    }
    else
    {
        snprintf(payload, sizeof(payload), "{\"ver\":\"%s\",\"name\":\"%s\""
                                           ",\"transport\":\"%s\"}",
                 PROV_QR_VERSION, name, transport);
    }
    ESP_LOGI(TAG, "Scan this QR code from the provisioning application for Provisioning.");
    esp_qrcode_config_t cfg = ESP_QRCODE_CONFIG_DEFAULT();
    esp_qrcode_generate(&cfg, payload);
    ESP_LOGI(TAG, "If QR code is not visible, copy paste the below URL in a browser.\n%s?data=%s", QRCODE_BASE_URL, payload);
}

void doorbell_wifi_init(doorbell_wifi_callback_t callback)
{
    // 5. 初始化回调
    doorbell_wifi_callback = callback;
    // 1. 初始化nvs flash存储
    esp_err_t ret = nvs_flash_init();
    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND)
    {
        ESP_ERROR_CHECK(nvs_flash_erase());
        ESP_ERROR_CHECK(nvs_flash_init());
    }

    // 2. 创建默认的event_loop
    ESP_ERROR_CHECK(esp_event_loop_create_default());
    ESP_ERROR_CHECK(esp_event_handler_register(WIFI_PROV_EVENT, WIFI_PROV_END, &doorbell_wifi_event_handler, NULL));
    esp_event_handler_register(WIFI_EVENT, WIFI_EVENT_STA_START, doorbell_wifi_event_handler, NULL);
    esp_event_handler_register(WIFI_EVENT, WIFI_EVENT_STA_DISCONNECTED, doorbell_wifi_event_handler, NULL);
    esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, doorbell_wifi_event_handler, NULL);

    // 3. 初始化tcp/ip协议栈
    ESP_ERROR_CHECK(esp_netif_init());
    esp_netif_t *netif = esp_netif_create_default_wifi_sta();
    assert(netif);

    // 4. 初始化wifi
    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    ESP_ERROR_CHECK(esp_wifi_init(&cfg));

    // 5. 配网
    wifi_prov_mgr_config_t prov_config = {
        .scheme = wifi_prov_scheme_ble,
        .scheme_event_handler = WIFI_PROV_SCHEME_BLE_EVENT_HANDLER_FREE_BTDM,
    };
    ESP_ERROR_CHECK(wifi_prov_mgr_init(prov_config));

    // 6. 检查设备是否已经配网
    bool is_provisioned = false;
    // ESP_ERROR_CHECK(wifi_prov_mgr_reset_provisioning());
    ESP_ERROR_CHECK(wifi_prov_mgr_is_provisioned(&is_provisioned));
    if (!is_provisioned)
    {
        ESP_LOGI(TAG, "Starting provisioning");

        char service_name[12];
        get_device_service_name(service_name, sizeof(service_name));
        wifi_prov_security_t security = WIFI_PROV_SECURITY_1;
        const char *pop = "abcd1234";
        wifi_prov_security1_params_t *sec_params = pop;

        const char *username = NULL;

        const char *service_key = NULL;
        uint8_t custom_service_uuid[] = {
            0xb4,
            0xdf,
            0x5a,
            0x1c,
            0x3f,
            0x6b,
            0xf4,
            0xbf,
            0xea,
            0x4a,
            0x82,
            0x03,
            0x04,
            0x90,
            0x1a,
            0x02,
        };

        wifi_prov_scheme_ble_set_service_uuid(custom_service_uuid);
        ESP_ERROR_CHECK(wifi_prov_mgr_start_provisioning(security, (const void *)sec_params, service_name, service_key));
        wifi_prov_print_qr(service_name, username, pop, PROV_TRANSPORT_BLE);
    }
    else
    {
        wifi_prov_mgr_deinit();
        ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
        ESP_ERROR_CHECK(esp_wifi_start());
    }
}

void doorbell_wifi_deinit()
{
    // 释放wifi资源
}
